4
Caution
There are no user serviceable parts nor maintenance
require ments for the AFCT-57R5ATPZ. All mechanical
adjustments are made at the factory prior to shipment.
Tampering with, modifying, misusing or improperly han-
dling the AFCT-57R5ATPZ will void the product warranty.
It may also result in improper operation and possibly
overstress the laser source. Performance degradation
or device failure may result. Connection of the AFCT-
57R5ATPZ to a light source not compliant with ANSI FC-PI
or IEEE 802.3 speci cations, operating above maximum
operating conditions or in a manner inconsistent with it’s
design and function may result in exposure to hazardous
light radiation and may constitute an act of modifying or
manufactur ing a laser product. Persons performing such
an act are required by law to re-certify and re-identify
the laser product under the provisions of U.S. 21 CFR
(Subchapter J) and TUV.
Ordering Information
Please contact your local eld sales engineer or one of
Avago Technologies franchised distributors for ordering
information. For technical information, please visit Avago
Technologies’ WEB page at www.avagotech.com or contact
Avago Technologies Semiconductor Products Customer
Response Center at 1-800-235-0312. For information
related to SFF Committee documentation visit www.
s committee.org.
Regulatory Compliance
The AFCT-57R5ATPZ complies with all applicable laws
and regulations as detailed in Table 1. Certi cation level
is dependent on the overall con guration of the host
equipment. The transceiver performance is o ered as a
gure of merit to assist the designer.
Electrostatic Discharge (ESD)
The AFCT-57R5ATPZ is compatible with ESD levels found
in typical manufacturing and operating environments as
described in Table 1. In the normal handling and oper-
ation of optical transceivers, ESD is of concern in two
circumstances.
The rst case is during handling of the transceiver prior
to insertion into an SFP compliant cage. To protect the
device, it’s important to use normal ESD handling pre-
cautions. These include using of grounded wrist straps,
work-benches and oor wherever a transceiver is handled.
The second case to consider is static discharges to the
exterior of the host equipment chassis after installation.
If the optical interface is exposed to the exterior of host
equipment cabinet, the transceiver may be subject to
system level ESD requirements.
Receiver Section
The receiver section includes the Receiver Optical Sub-
Assembly (ROSA) and the ampli cation/quantization
circuitry. The ROSA, containing a PIN photo diode and
custom transimped ance ampli er, is located at the optical
interface and mates with the LC optical connector. The
ROSA output is fed to a custom IC that provides post-
ampli cation and quantization.
Receiver Loss of Signal (Rx_LOS)
The post-ampli cation IC also includes transition detec-
tion circuitry which monitors the ac level of incoming
optical signals and provides a TTL/CMOS compatible
status signal to the host (pin 8). An adequate optical
input results in a low Rx_LOS output while a high Rx_LOS
output indicates an unusable optical input. The Rx_LOS
thresholds are factory set so that a high output indicates
a de nite optical fault has occurred. Rx_LOS can also be
monitored via the two-wire serial interface (address A2h,
byte 110, bit 1).
Functional Data I/O
The AFCT-57R5ATPZ interfaces with the host circuit
board through twenty I/O pins (SFP electrical connector)
identi ed by function in Table 2. The board layout for this
interface is depicted in Figure 6.
The AFCT-57R5ATPZ high speed transmit and receive
interfaces require SFP MSA compliant signal lines on the
host board. To simplify board requirements, biasing resis-
tors and ac coupling capacitors are incorporated into the
SFP transceiver module (per SFF-8074i) and hence are
not required on the host board. The Tx_Disable, Tx_Fault,
Rx_LOS require TTL lines on the host board (per SFF-8074i)
if used. If an application chooses not to take advantage
of the functionality of these pins, care must be taken to
ground Tx_Disable (for normal operation).
Figure 2 depicts the recommended interface circuit to
link the AFCT-57R5ATPZ to supporting physical layer ICs.
Timing for MSA compliant control signals implemented
in the transceiver are listed in Figure 4.
Application Support
An Evaluation Kit and Reference Designs are available to
assist in evaluation of the AFCT-57R5ATPZ. Please contact
your local Field Sales representative for availability and
ordering details.
